code: def test_each_channel():
      filtered = edges_each(COLOR_IMAGE)
      for i, channel in enumerate(np.rollaxis(filtered, axis=-1)):
          expected = img_as_float(filters.sobel(COLOR_IMAGE[:, :, i]))
          assert_allclose(channel, expected)
  
file_path: scikit-image/skimage/color/tests/test_adapt_rgb.py
imports: from functools import partial
  import numpy
  from skimage import img_as_float, img_as_uint
  from skimage import color, data, filters
  from skimage.color.adapt_rgb import adapt_rgb, each_channel, hsv_value
label_desc: Use image node_id 8 for calling a global function with example usage: test_each_channel() without return types